Question

26 what do sebaceous glands secrete? a sebum b collagen c keratin d sweat

Explanation:

Sebaceous glands are oil - producing glands in the skin. They secrete sebum, which helps lubricate the skin and hair. Collagen is a protein in connective tissues, keratin is in hair, nails and outer layer of skin, and sweat is secreted by sweat glands.

Answer:

A. sebum